Satsumanus robusta sp. nov.

(Figs. 1–11)

Diagnosis. This species is differentiated from other species of the genus Satsumanus by following characters: Vertex ochraceous with brown irroration, small black spot one on either side of median line on the hind margin; pronotum ochraceous with four to five longitudinal fuscous white bands (Fig. 3). Pygofer trapezoidal, dorso-posterior margin produced into roundish triangular lobe, group of macrosetae confined to postero-caudal region, anal tube membranous (Fig. 9). Subgenital plate with uniseriate setae confined outer lateral margin without long hair like setae and apex digitate with 0.25x as long as total length of plate (Fig. 8). Style without well-defined preapical lobe, apophysis stout more or less straight and transversely rugose, apex broad (Fig. 5). Connective Y-shape, length of stem as long as arms, arms strong divergent (Fig. 10). Aedeagus in lateral view, curved dorsad, with a pair of straight ventral processes longer than the shaft, articulated, more parallel to each other (Fig. 7).

Description.

Colour. Small, straminous to brown body coloration with brown and white speckles (Fig. 1). Vertex ochraceous with brown irroration, small black spot one on either side of median line on the hind margin of vertex (Fig. 3). Face ochraceous, eyes reddish brown, ocelli creamy white (Fig. 4). Pronotum ochraceous with four to five longitudinal fuscous white bands; mesoscutum with straminous basal triangles on either side, scutellum brownish yellow (Fig. 3). Forewing macropterous, straminous, semi-transparent, brown speckles throughout wing and prominent yellowish orange veination, apex darker (Fig. 2). Appendix extending up to subapical. Legs light yellowish, on tibia bases of setae brown (Fig. 2).

Head including eyes about 1.08x width of pronotum. Anterior margin of head roundly produced. Median length of vertex between eyes 0.3x as short as its width or equals to half width of eyes (Fig. 3). Face round, lateral frontal suture extending to ocelli, lateral frontal suture longer than clypeogenal suture (Fig. 4). Antenna situated posteroventral corner of eyes, antennal ledge weakly developed (Fig. 4). Pronotum length 0.47x as short as its width, anterior margin convex, posterior margin slightly concave. Scutellum length 0.67x as short as its width at base (Fig. 3).

Male genitalia. Pygofer in lateral view, trapezoidal, 1.67x as long as its width, dorso-posterior margin produced into roundish triangular lobe, group of macrosetae confined to posterocaudal region, anal tube membranous (Fig. 9). Valve triangular, valve at base 0.69x as long as its median length (Fig. 11). Subgenital plate triangular, uniseriate macrosetae (5–6) with long hair like setae confined to outer lateral margin, apex of plate digitate 0.25x as long as total length of plate (Fig. 8). Style without well-defined preapical lobe, apophysis stout more or less straight and transversely rugose, apex broad (Fig. 5). Connective Y-shape, length of stem as long as arms, arms strong divergent (Fig. 10). Aedeagus in lateral view, curved dorsad, with a pair of straight ventral processes longer than the shaft, articulated, more parallel to each other; in lateral view aedeagal shaft broad at base, divergent from process after midlength without any small process (Fig. 7). In ventral view, aedeagus shaft broad at base, stout, tubular, slightly tapering towards apex, gonopore open preapical; aedeagal process 1.5x as long as length of aedeagal shaft (Fig. 6).

Etymology. The species name “ robusta ” refers to the relatively broad and robust aedeagal shafts.

Type material. Holotype ♂, India: Kerala: Nelliyampathy, 10.5354° N, 76.6936° E, 26.v.2019, Light trap, Meshram N. M. (NPC-IARI).

Remarks: This new species closely resembles Satsumanus satsumae (Matsumura) in external coloration as illustrated and described by Ishihara (1953) and Kim and Jung (2020) but differs in the following male genitalia characters (features of S. satsumae in parentheses): ventral process of aedeagus articulated (probably not articulated in other species of genus); style without well-defined preapical lobe, apophysis stout more or less straight and transversely rugose, apex broad. (style preapical lobe well-developed and apophysis tapered distally and curved, more or less slender); connective stem as long as arms, arms strongly divergent (connective stem slightly longer or similar to arms; arms not strongly divergent).